Thanks to all for your suggestions.
Croc, I have contacted Chaters and Ronald and will be happy to share a pdf if my search is successful. Your link for the S4 manual is very helpful though I do recognize that there are major differences between the S3 and S4 cars.
SENC, here is a link to information and photos of the car;
https://www.bonhams.com/auctions/26807/lot/47/
I am also fortunate to have a 1972 Elan Sprint with it’s original owner’s manual but that didn’t help me for example find the push to start button. I have been a source of lots of laughs for my wife and friends as I get to know the car. Watching me wriggle my 5’10” 220 lb frame into the car was quite comical as was my search for the start button. I expect lots more fun will be had.
Christopher, There is an image on the lotusdriversguide.com of an S3 manual so I think something does exist. My car was a Canada delivery car and my understanding is that all of those were factory built cars rather than kits.
Thanks again for everyone’s help,
Walt